YES Problem 1: (VAR v_NonEmpty:S x1:S) (RULES a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ) Problem 1: Dependency Pairs Processor: -> Pairs: A(b(x1:S)) -> A(x1:S) A(b(x1:S)) -> B(c(a(x1:S))) B(a(x1:S)) -> A(c(b(x1:S))) B(a(x1:S)) -> B(x1:S) B(c(x1:S)) -> B(b(x1:S)) B(c(x1:S)) -> B(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) Problem 1: SCC Processor: -> Pairs: A(b(x1:S)) -> A(x1:S) A(b(x1:S)) -> B(c(a(x1:S))) B(a(x1:S)) -> A(c(b(x1:S))) B(a(x1:S)) -> B(x1:S) B(c(x1:S)) -> B(b(x1:S)) B(c(x1:S)) -> B(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: B(a(x1:S)) -> B(x1:S) B(c(x1:S)) -> B(b(x1:S)) B(c(x1:S)) -> B(x1:S) ->->-> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->->Cycle: ->->-> Pairs: A(b(x1:S)) -> A(x1:S) ->->-> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) The problem is decomposed in 2 subproblems. Problem 1.1: Reduction Pair Processor: -> Pairs: B(a(x1:S)) -> B(x1:S) B(c(x1:S)) -> B(b(x1:S)) B(c(x1:S)) -> B(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) -> Usable rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 1 ->Bound: 2 ->Interpretation: [a](X) = 2.X + 1 [b](X) = X [c](X) = X [B](X) = 2.X Problem 1.1: SCC Processor: -> Pairs: B(c(x1:S)) -> B(b(x1:S)) B(c(x1:S)) -> B(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: B(c(x1:S)) -> B(b(x1:S)) B(c(x1:S)) -> B(x1:S) ->->-> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) Problem 1.1: Reduction Pair Processor: -> Pairs: B(c(x1:S)) -> B(b(x1:S)) B(c(x1:S)) -> B(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) -> Usable rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Interpretation type: Linear ->Coefficients: Natural Numbers ->Dimension: 2 ->Bound: 1 ->Interpretation: [a](X) = [1 1;1 0].X + [1;0] [b](X) = [1 1;0 1].X + [1;0] [c](X) = [0 0;0 1].X + [0;1] [B](X) = [0 1;0 1].X Problem 1.1: SCC Processor: -> Pairs: B(c(x1:S)) -> B(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Strongly Connected Components: ->->Cycle: ->->-> Pairs: B(c(x1:S)) -> B(x1:S) ->->-> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) Problem 1.1: Subterm Processor: -> Pairs: B(c(x1:S)) -> B(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Projection: pi(B) = 1 Problem 1.1: SCC Processor: -> Pairs: Empty -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Strongly Connected Components: There is no strongly connected component The problem is finite. Problem 1.2: Subterm Processor: -> Pairs: A(b(x1:S)) -> A(x1:S) -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Projection: pi(A) = 1 Problem 1.2: SCC Processor: -> Pairs: Empty -> Rules: a(b(x1:S)) -> b(c(a(x1:S))) b(a(x1:S)) -> a(c(b(x1:S))) b(c(x1:S)) -> c(b(b(x1:S))) ->Strongly Connected Components: There is no strongly connected component The problem is finite.